Metallurgical apparatus.



PATENTED JUNE 19,1906. E. A. TGUGBDA.

METALLURGIGAL APPARATUS. PPLIOATISI Hum Imc. q, 1905.

2 SHEETS-SHEET 1.

'PATENTED JUNE 19, 1906.

E. A. TOUGEDA. MBTALLURGICAL APPARATUS.

APPLICATION :FILED DEC.5, 1905.

2 SHEETS-SHEET 2.

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PATENT carica@ ENRIQUE A. TOUOEDA, OF ALBANY, NEW YORK.

NIETALLURGlCAL APPARATUS.

Specification of Letters Patent.

Patented June 19, 1906.

Original applicationled January 28, 1905, Serial No. 243,015. Dividedand this application filed December 5,1905. SeriallNo. 290391l T0 all when?, it viz/(Ly concern:

Be it known that I, ENRIQUE A. ToUoEDA, a citizen ofthe United States, residing at Albany, county of Albany, and State of New York, have invented certain new and useful Improvements in Metallurgical Apparatus,

of which the following is a specification. The invention relates to such improvements; and 1t consists of the novel construction and combination of parts hereinafter de-v scribed and subsequently claimed.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, which form a part ofvthis specification.

Similar 'characters refer to similar parts in both figures therein.

Figure 1 of the drawings is a central vertical longitudinal section ofpa coal-burning reverberatory furnace adapted for the practice of my invention. Fig. 2 is a View partly in elevation and.a partly in cross-section, of the same.

The principal objects of this invention are to secure greater economy in time and fuel and to permit without increased fuel expense a wider range in the chemical composition of the material under treatment in the operation of metallurgical furnaces.

Other obiects willl appear in connection with the following description.

such heat usually escaping throu Theinvention consists in the apparatus hereinafter set forth whereby heat of comparatively low intensity escaping from a metallurgical furnace is converted into elec trically-generated heat of a comparatively high intensity and returned Within the fur nace.

The invention is a plicable in the use ofl various kinds of meta lurgical furnace adapted for burning solid, liquid, or vgaseous fuel, and it is particularly adapted for use in anon-regenerative reverberatory furnace in the process of preparing iron for malleable castings, in connection with which it will 'be more particularly described.

In the known types of nonaregenerative reverberatory furnace whether adapted for solid, liquid, or gaseous fuel less perhaps than ten per cent. of the total heat units available in the fuel is 4communicated to the materials on the hearth, the remainder of h the stack, as is well understood those s illed in the art. It -has been thus ar found impracticable to profitably utilize this enormous waste ble in the original type of furnace of this class many years ago, with only the exception that air is now judiciously introduced over the grate-bridge wall to insure more perfect combustion, it being a notorious fact that less improvement has been made in the type of reverbcratory furnace. referred to than in any other furnace in which metallurgical operations are conducted.

By the use of my invention I am able to save and return within the furnace in highlyefficient form a large percentage of such heat as would otherwise be lost, resulting in a large saving in time and fuel in the operation of the furnace, as well as adapting it for a Wider range of use, as will be hereinafter more fully set forth.

Referring to the drawings, wherein is .shown a preferred form of apparatus for the practice of my invention, 1 is the fire-box, provided with the'grate 2, adapted for burning solid fuel, as coal, the heated gases from the fire-box being deflected by the arched ceiling 4 toward the hearth 5, all constructed and adapted to operate in substantially the same manner as the ordinary coal-burning non-regenerative reverberatory furnace. -Between the hearth-cha1nber and the stack 6 is located a steam-,boiler 7, which may be of any known type adapted for the generation of steam by the heat derived from the gases escaping from the hearth-chamber to ythe stack, which gases after passing said boiler are permitted to escape through the stack. A steam-supplypipe S leads from the boiler 7 `toa steam-engine 9, which may bve of any known form and which is connected with a dynamo 10 to operate the same. Said dynamo is connected by wires 11 through a switchboard 12 in circuit witha pair of arc forming electrodes 13, whichproject inte riorl y of the hearth-chamber in proximity to the hearth and in position for the heat from 'said arc te be sufficiently exerted upon the materials under treatment on the hearth. Any desired number of pairs of such electrodes may be thus connected with said dynamo, and the `switchboard 12 may be provided With the usual devices for regulating and controlling the supply of eletgrical en- ICO ergy to `the electrodes. Any lrnoWn means .may be employed to convert the Waste heat from the furnace .into electrical energy, and any known form of 'electrical heating apparatus capable of withstanding the heat of the `furnace may be employed.

The electrodes 13 shown are preferably carbons, adjustably mounted at 14. The adjustment of the electrodes may-be accomplished in any known manner and their positions may be changed from time to time to adapt them for most advantageous use in the particular metallurgical operation in hand.-

It will thus be seen that I am able to effectively supplement the heat due to the reverberatory action of the furnace by the heat generated by the electric heater Within the hearth chamber, which electrically generated heat is of great intensity and highly efficient, enabling me to secure from a given supply of fuel the effectiveness of a greater number of heat units and a greater intensity of heat than has heretofore been found possible in fuel-burning metallurgical furnaces.

It will be observed that such portion of the electrically-generated heat as may be ineffective upon the materials on the hearth is not Wholly lost, but in passing to the stack again serves to heat the boiler, and a large percentage thereof1 is again returned Within the furnace through the electric heating device.

for the conversion of heat emanating from any part of such a furnace into electricallygenerated heat Within any part thereof.

Imake no claim herein to the improvements in the art or method herein disclosed, as the same forms the subject of another application made by me filed January 28, 1905, Serial No. 243,015, of which the present aplication isa division,

What I claim as new, and desire to secure by Letters Patent, is-

1. In a metallurgical apparatus, the combination with a metallurgical furnace; of

means for converting heat emanating from bination with a fuel-burning metallurgical furnace; of an electric heater located Within said furnace; an electrical generator connected with said electric heater, and a generatoroperating motor operated by heat emanatingfrom said furnace.

4. In a metallurgical apparatus, the combination-With a metallurgical furnace; of an electric heater located within" said furnace; means for converting heat emanating from said furnace into electrical energy; and means for su plying said electrical energy to said electric eater.

5. In a metallurgical apparatus, the combination with a reverberatory furnace; of a steam-boiler; means for supplying to said boiler heat emanating from said furnace; a steam-engine; means for supplying said engine with steam from said boiler; an electrical generator operatively connected with said engine; and an ,electric heater located within said furnace in circuit With said electrical generator.

6. In a metallurgical apparatus, the combination with a reverberatory furnace; of a steam-boiler; means for supplying to said boilerheat emanating from said furnace; a steam-engine; means for supplying said. engine With steam from said boiler; an electrical generator operatively connected with 'said engine; and a pair of anc-forming electrodes located Withm said furnace in circuit y with said generator. 

